Sorry to have put you through the manual process...
While researching the possibility of a console based installer, I was informed that one can run the netinstaller (.sh) with a -c option to perform a console based install. If one downloads the offline installer (.zip) one must first unzip the download and one can then run the resulting installer (.sh) with the same -c option.

Currently there is an error thrown at the very end of the install which appears to have no impact on the resulting installation. We will look it to it and get that cleaned up as soon as we can fit it in to the schedule.

Glad you got it working, albeit the more manual way, but now the whole community has benefited!